GCSE Edexcel Chemistry Combined Science Separating mixtures: The three states of matter are s

Question

The three states of matter are solid, liquid and gas.
(a) What is the name of the change of state when a liquid changes into a solid?
A   condensation
B   evaporation
C   freezing
D   melting

(b) A gas was left to cool to form a liquid.
Figure 1 shows how the temperature of the substance changed with time.
From A to B the substance is a gas.
From C to D the substance is a liquid.
(i) State the time when the gas first started to form a liquid.

(ii) Calculate the number of minutes it took from the gas first starting to form a liquid until the substance was completely liquid.

(c) Figure 2 shows the melting points and boiling points of four substances, W, X, Y and Z.
Using the information in Figure 2
(i) give the letter of the substance that is a solid at 20°C
(ii) give the letter of a substance that is a liquid at 50°C.

The three states of matter are solid, liquid and gas - Edexcel - GCSE Chemistry Combined Science - Question 1 - 2019 - Paper 1

Worked Solution & Example Answer:The three states of matter are solid, liquid and gas - Edexcel - GCSE Chemistry Combined Science - Question 1 - 2019 - Paper 1

What is the name of the change of state when a liquid changes into a solid?

State the time when the gas first started to form a liquid.

Calculate the number of minutes it took from the gas first starting to form a liquid until the substance was completely liquid.

give the letter of the substance that is a solid at 20°C

give the letter of a substance that is a liquid at 50°C.

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